Wilhelm eeissig



UNITED STATES PATENT QFFICEQ \VlLHELM REISSIG, OF DARMSTADT, ASSIGNOR TO GEBRUEDER SCHMIDT,

' OF BOGKENHEIM, NEAR FRANKFORT-ON-TIIE-MA1N, GERMANY.

PRINTING-INK.

SPECIFICATION forming part of Letters Patent No. 265,867, dated October 10, 1882. Application filed July 22, 1882. (No specimens.)

To all zrhom it may concern:

Be it known that I, Dr. WlLHELM REISSIG, a subject of the Emperor of Germany, and resident at Darmstadt, Germany, have invent- 5 ed new and useful Improvements in Printingln k, of which the following is a specification.

The printing-ink in general use heretofore consists chiefly of lamp-black and linseed-oil varnish, and can never be thoroughly extracted to from paper upon which it has been printed.

The varnish can be extracted; but the lampblack resists all chemical agents and dissolvents, and paper once printed upon with this ink can never be used for the manufacture of clean white paper again.

The object of my invention is to avoid the above defects, and to this end I do not use lamp-black for the manufacture of printingink, but substitute other materials which can be entirely removed from the paper bychemical agents.

In the manufacture of printing-ink according to mynew and improved method I employ the black or dioxide of manganese, a sub- .2 stance obtained as a residue in great quantities in chemical works-for instance, in sodamauufactories.

Manganese in all its varieties, and especially the deep-black combination of oxygen 0 and manganese, can be used. The proportions of the above-mentioned materialthat is, the black or dioxide of manganese and thelinseedmade a solution of caseinein alkalies; or I have mixed the caseine with the above-named materials and burned magnesia. The substances used to tone the ink-for instance, such as nigrosine, &c.\vhich also have been used in printing-ink made heretofore, are used in my improved printing-ink for the same purpose.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is- I An improved printers ink consisting, as

herein described, of black or dioxide of manganese and linseed-oil varnish, as set forth.

In testimony whereot'l have signed my name to this specification in the presence of two subscribing witnesses.

\VILHELM BEIS SIG.

Witnesses:

FRANZ VVIRTH, FRANZ HASSLACHER. 

